overachiever

Definition of Overachiever in English :

1. overachiever

a student who attains higher standards than the IQ indicated

WordNet Lexical Database for English. Princeton University. 2010.

Overachiever

verb

(intransitive)

to perform (for example, in examinations) better than would be expected on the basis of one's age or talents

verb intransitiveWord forms: ˌoveraˈchieved or ˌoveraˈchieving

1.

to do better in school studies than might be expected from scores on intelligence tests

2.

to drive oneself obsessively in trying to reach unreasonable goals

intr.v. o·ver·a·chieved, o·ver·a·chiev·ing, o·ver·a·chieves

To perform better or achieve more success than expected.